The 22 First Magnitude Stars
... • We are on the Earth’s surface • Earth’s radius (4000 mi) is insignificant compared to stellar distances (25 trillion miles to nearest star) • So we can simplify: – move our origin to the center of the Earth – ignore distance and deal only in ...
... • We are on the Earth’s surface • Earth’s radius (4000 mi) is insignificant compared to stellar distances (25 trillion miles to nearest star) • So we can simplify: – move our origin to the center of the Earth – ignore distance and deal only in ...
Extra-Solar Planets
... • We can also transmit a signal (but it’s a long wait for the answer...) • Different kinds of signals to listen for: – local communication signals: on Earth, this includes TV, radio, etc. – communication between the planet and another site, such as satellites and spacecraft – A BEACON signal used to ...
... • We can also transmit a signal (but it’s a long wait for the answer...) • Different kinds of signals to listen for: – local communication signals: on Earth, this includes TV, radio, etc. – communication between the planet and another site, such as satellites and spacecraft – A BEACON signal used to ...
chap17_s05_probs
... A star is determined to have a surface temperature twice that of the Sun, and a luminosity 64 times greater. What is this star’s radius, expressed in solar units ? ANSWER: Problem 4 is an application of the radius – luminosity – temperature relation for stars. Given two of these values, the third va ...
... A star is determined to have a surface temperature twice that of the Sun, and a luminosity 64 times greater. What is this star’s radius, expressed in solar units ? ANSWER: Problem 4 is an application of the radius – luminosity – temperature relation for stars. Given two of these values, the third va ...
Document
... working with a group of English astronomers, discovered a periodic signal in the radio part of the spectrum, coming from a distant galaxy. • Astronomers considered (briefly) the possibility of an alien civilization sending the regular pulses. ...
... working with a group of English astronomers, discovered a periodic signal in the radio part of the spectrum, coming from a distant galaxy. • Astronomers considered (briefly) the possibility of an alien civilization sending the regular pulses. ...
The Death of Stars
... • The Sun will become a carbon/oxygen white dwarf with a mass of 0.6Msun. • Stars up to 8Msun become carbon/oxygen white dwarfs with masses up to ~1.1Msun. • Stars below 0.45Msun aren’t massive enough to burn helium in their core and become helium white dwarfs. • Stars with masses from 8-10Msun have ...
... • The Sun will become a carbon/oxygen white dwarf with a mass of 0.6Msun. • Stars up to 8Msun become carbon/oxygen white dwarfs with masses up to ~1.1Msun. • Stars below 0.45Msun aren’t massive enough to burn helium in their core and become helium white dwarfs. • Stars with masses from 8-10Msun have ...
March 2017 - Shasta Astronomy Club
... The team picked 22 stars, including the Sun, to study. The chemical elements have been carefully measured from data coming from ground-based high-resolution spectra taken with large telescopes located in the north of Chile. Once the families were identified using the chemical DNA, their evolution wa ...
... The team picked 22 stars, including the Sun, to study. The chemical elements have been carefully measured from data coming from ground-based high-resolution spectra taken with large telescopes located in the north of Chile. Once the families were identified using the chemical DNA, their evolution wa ...
Passport to the Universe Educator`s Guide Text
... the Earth and the other planets in the larger scheme of things. From out here, the sizes of and distances between the Earth, Sun, and other planets appear relatively small. On our trip, we pass three of the eight planets—Mars, Jupiter (and its moons, Io and Europa), and Saturn. We now head out for ...
... the Earth and the other planets in the larger scheme of things. From out here, the sizes of and distances between the Earth, Sun, and other planets appear relatively small. On our trip, we pass three of the eight planets—Mars, Jupiter (and its moons, Io and Europa), and Saturn. We now head out for ...
Chapter 18 Notes - Valdosta State University
... Most galaxies are thought to have a super massive black hole at the center. That would explain the high velocities of stars orbiting near the center, the tremendous energy generated by the core and the shape of most galaxies. The most distant objects detected in the universe are called quasars (qua ...
... Most galaxies are thought to have a super massive black hole at the center. That would explain the high velocities of stars orbiting near the center, the tremendous energy generated by the core and the shape of most galaxies. The most distant objects detected in the universe are called quasars (qua ...
The Distances to the Stars
... nearest stars. For all of its cosmic grandeur, the measurement of the distances to stars is founded in the most classic surveying technique - triangulation - and the most ancient astronomical observation astrometry. Astrometry is the careful measurement of the positions in the sky of celestial objec ...
... nearest stars. For all of its cosmic grandeur, the measurement of the distances to stars is founded in the most classic surveying technique - triangulation - and the most ancient astronomical observation astrometry. Astrometry is the careful measurement of the positions in the sky of celestial objec ...
Star formation and lifetimes
... • Which will have a greater core temperature and density – a high mass star or a low mass star? • Which will then have a greater fusion rate? • Which will use up its fuel more quickly? • What is the fuel? ...
... • Which will have a greater core temperature and density – a high mass star or a low mass star? • Which will then have a greater fusion rate? • Which will use up its fuel more quickly? • What is the fuel? ...
Nov 2009
... (h) State the two quantities that need to be measured in order to use a Cepheid variable as a “standard candle” to determine the distance to the galaxy in which the Cepheid is located. ...
... (h) State the two quantities that need to be measured in order to use a Cepheid variable as a “standard candle” to determine the distance to the galaxy in which the Cepheid is located. ...
chap17_f04_probs
... ANSWER: Problem 4 is an application of the radius – luminosity – temperature relation for stars. Given two of these values, the third is found using that relation, described on pg 449 in the text. In solar units, L = R2 x T4 , substituting into the expression gives 64 = R2 x 24 , 64 = R2 x 16 Dividi ...
... ANSWER: Problem 4 is an application of the radius – luminosity – temperature relation for stars. Given two of these values, the third is found using that relation, described on pg 449 in the text. In solar units, L = R2 x T4 , substituting into the expression gives 64 = R2 x 24 , 64 = R2 x 16 Dividi ...
Calculating_Main_Sequence_Lifetimes_StudentGuide
... The luminosity (L) of a star is the energy radiated from all of its surface in one second. The absolute magnitude (M) is used usually to measure the luminosity of the stars; it is related to the stellar luminosity by an approximate relation: L star M 2.5log ...
... The luminosity (L) of a star is the energy radiated from all of its surface in one second. The absolute magnitude (M) is used usually to measure the luminosity of the stars; it is related to the stellar luminosity by an approximate relation: L star M 2.5log ...
Supplemental Resources - Morehead Planetarium and Science
... 7c. Identify at least one red star, one blue star, and one yellow star (other than the Sun). Explain the meaning of these colors. Look up into the sky and you’ll see the stars twinkling in different colors. Some are dull and red, while others are white and others look bright blue. So how do you get ...
... 7c. Identify at least one red star, one blue star, and one yellow star (other than the Sun). Explain the meaning of these colors. Look up into the sky and you’ll see the stars twinkling in different colors. Some are dull and red, while others are white and others look bright blue. So how do you get ...
Due: January 15, 2014 Name
... 12. Which effect has been useful (and successful) in the search for and identification of black holes in the universe? a. their magnetic fields and their influence on nearby matter. b. the effect of their angular momentum or spin on nearby matter. c. the influence of their intense gravitational fiel ...
... 12. Which effect has been useful (and successful) in the search for and identification of black holes in the universe? a. their magnetic fields and their influence on nearby matter. b. the effect of their angular momentum or spin on nearby matter. c. the influence of their intense gravitational fiel ...
PHYSICS 1500 - ASTRONOMY TOTAL: 100 marks Section A Please
... Section A Please use the answer sheet provided for this section. 20 multiple choice questions (1 mark each) ...
... Section A Please use the answer sheet provided for this section. 20 multiple choice questions (1 mark each) ...
URAT-1 - Gaia Portal
... Official URAT1 star ID numbers consist of 2 parts, the 3-digit zone number (zzz) and the 6-digit running record number (nnnnnn) along a zone. Thus a URAT1 star number is given by: URAT1-zzznnnnnn The main catalog data are arranged in declination zones of 0.2 degree width. Zones are numbered from 1 s ...
... Official URAT1 star ID numbers consist of 2 parts, the 3-digit zone number (zzz) and the 6-digit running record number (nnnnnn) along a zone. Thus a URAT1 star number is given by: URAT1-zzznnnnnn The main catalog data are arranged in declination zones of 0.2 degree width. Zones are numbered from 1 s ...
"Stars" Power Point notes
... Star Brightness • Apparent magnitude is the apparent brightness of a star as measured on Earth. - Apparent magnitude depends on the star’s actual brightness and distance. - The smaller the magnitude number, the brighter the star. (http://spaceweather.com/flybys ) ...
... Star Brightness • Apparent magnitude is the apparent brightness of a star as measured on Earth. - Apparent magnitude depends on the star’s actual brightness and distance. - The smaller the magnitude number, the brighter the star. (http://spaceweather.com/flybys ) ...
SRP_Space_Lesson 5 - Scientist in Residence Program
... Stars move across the night sky throughout the night, they also move ‘off’ the sky depending on the season, or might not be visible at all from a given location. This might become easier to understand if we remember that it is not the stars that are moving, but the Earth. The movement of the stars t ...
... Stars move across the night sky throughout the night, they also move ‘off’ the sky depending on the season, or might not be visible at all from a given location. This might become easier to understand if we remember that it is not the stars that are moving, but the Earth. The movement of the stars t ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.